Origin: < ML (
insula)
avallonis (Geoffrey of Monmouth) (island) of Avallon, lit., apple tree (island) < a British Celt s. for apple tree, c. Welsh
afall (pl. collective), Middle Breton
avallenn (sing.), OIr
aball (fem.) <
*ǫbǫl-n-, c. Slavic *(
j)
ablanĭ; see apple 